Fluid motor



April 19, 1966 R. E. RAYMOND FLUID MOTOR 6 Sheets-Sheet 1 Filed Dec. 12, 1962 INVENTOR. ROBE/PT E RAYMOND A TTOR/VEYS April 19, 1966 R. E. RAYMOND 6 Sheets-Sheet 2 Filed Dec. 12, 1962 I VENTOR. ROBERT E. man/0 .4 TTOR/VEY-S' April 9, 1966 R. E. RAYMOND 3,246,575

Filed Dec. l 2 l 9 62 6 Sheets-Sheet 5 INVENTOR. ROBERT E. RA YMO/VD A TTOR/VEYS April 19, 1966 R. E. RAYMOND FLUID MOTOR 6 Sheets-Sheet 4 Filed Dec. 12, 1962 F IG 5 INVENTOR. ROBERT 5 RA YMOND FIG 4 FIG 6 A Zjz A TTORNEYS April 19, 1966 R. E. RAYMOND 3,246,575

FLUID MOTOR Filed Dec. 12, 1962 6 Sheets-Sheet 5 INVENTOR. ROBE/P75 RAYMOND XMJ JZE ATTORNEYS April 19, 1966 R. E. RAYMOND 6 Sheets-Sheet 6 Filed Dec. 12, 1962 FIG 10 INVENTOR. ROBERT 5. RA YM 0ND A TTORNEYS 3,246,575 FLUKE) MOTOR Robert E. Raymond, Zanesville, Ohio, assiguor to Hydro-Kinetics, lino, Zanesville, Ohio Filed Dec. 12, 1962, Ser. No. 244,091 21 Claims. (Cl. 91-175) This invention relates generally to hydraulic machines and particularly to a novel axial piston type fluid motor.

In general, the fluid motor of the present invention comprises a housing means that forms an envelope for a novel removable cartridge-type mot-or mechanism which uniquely incorporates a removable and integral assembly of the following components:

(1) A cylinder barrel forming a plurality of axially disposed cylinders for the pistons, an integrally cast annular manifold means for feeding and draining the cylinders; and a timing valve chamber centrally of the manifold means.

(2) Pistons in the cylinders that include end portions extended from one end of the barrel and attached foot portions formed of gall-proof resinous material.

(3) Reaction plugs in the cylinders and extended from the other end of the barrel for force transmitting engagement with the housing means. These plugs also uniquely function as seals for dividing the manifold means into intake and exhaust chambers.

(4) A yoke member overlying and carried by the piston foot portions for biasing the pistons towards a cam means and output shaft assembly mounted in the housing envelope.

(5) A rotary timing valve member disposed in the valve chamber and comprising an end portion extended from the cylinder barrel in force transmitting relationship with the yoke member. The end portion of the driving valve member also carries a valve driver for driven engagement with the cam means.

(6) A reaction plate carried by and joining the extended ends of the reaction plugs and forming therewith a removable subassembly that also functions to retain together the components of the cartridge.

(7) Reaction pins slideably extended from an end of the timing valve member and including an inner pin end exposed to pressurized fluid in a valve chamber in the member and an outer pin end in force transmitting relationship with the reaction plate. These pins serve to hydraulically bias the pistons against a cam means and output shaft assembly journaled in the housing means.

In addition to the above listed components of the integrally removable cartridge type motor mechanism, the apparatus further includes transfer valve members that form inlet and outlet passages that lead from the exterior of the housing means to the cartridge assembly.

As another aspect of the present invention the above described cartridge assembly is supported in the housing means by axially extending barrel bearings that serve to transmit torque reaction forces from the motor cartridge to the housing means. In addition, these barrel bearings mount the cylinder barrel for axial vibratory movement for the purpose of eliminating breakaway friction and hydraulic locking effects.

As another aspect of the present invention, the fluid motor comprises an annular piston mounted for vibratory movement in a cylinder formed by the housing means, said piston being in force transmitting relationship with the cylinder barrel to provide means for vibrating or dithering the barrel relative to the pistons and timing valve member. This vibration or dither reduces breakaway friction and eliminates hydraulic locking effects on both the pistons and timing valve.

As still another aspect of the present invention the United States Patent 0 3,246,575 Patented Apr. 19, 1966 output shaft means and eccentric are uniquely adapted to function as a coolant pump for delivering a flow of coolant fluid axially through the housing means and in heat exchange relationship with the previously mentioned piston and timing valve mechanism in the cartridge.

It is therefore an object of the present invention to provide a cartridge type mot-or apparatus that combines the basic motor components in an integral and removable assembly that can readily be incorporated in various envelopes or frame portions of related mechanisms.

It is another object of the present invention to provide an apparatus of the type described that comprises a cylinder barrel that includes an integrally formed annular manifold means and which supports reaction plugs that serve the dual function of dividing the manifold means into intake and exhaust chambers and transmitting axial piston reaction forces to the housing means.

It is another object of the present invention to provide an apparatus of the type described that comprises pistons provided with gall-proof foot portions formed of resinous material reinforced by cup-shaped metal foot housings. This piston foot construction greatly reduces starting friction and contributes materially to the efiiciency of the ap paratus.

It is another object of the present invention to provide an apparatus of the type described that Comprises a timing valve member mounted in the center of a cartridge mechanism and adapted to supply and drain fluid between a surrounding annular manifold means and a surrounding array of axially extending cylinders.

It is another object of the present invention to provide an apparatus of the type described that comprises and utilizes a timing valve member as part of a mechanism for axially biasing a plurality of pistons against adriven cam means.

It is another object of the present invention to provide an apparatus of the type described that comprises and utilizes a timing valve member that is rotatably mounted in a cartridge type motor mechanism and driven by a flexible disengageable connection with an output shaft means such that the cartridge and timing mechanism can be removed as a unit from the housing means.

It is another object of the present invention to provide an apparatus of the type described that comprises a cartridge type motor mechanism that includes a reaction plug and reaction plate subassembly which provides means for transmitting piston reaction forces to the housing and which also serves to hold together the components of the cartridge when it is removed from the housing means.

It is another object of the present invention to provide an apparatus of the type described that comprises a cartridge type motor mechanism thatincorporates reaction pins for hydraulically biasing the pistons against a cam means and output shaft assembly journaled in the housing means.

It is another object of the present invention to provide an apparatus of the type described that comprises transfer valve members that provide inlet and outlet passage means that connect the cartridge type motor mechanism with the exterior of its housing. These transfer valve members form a self aligning surface contact seal with the cartridge and thereby provides an assembly that is insensitive to minor disalignments.

It is another object of the present invention to provide an apparatus of the type described that comprises a cartridge type motor apparatus that includes an axially shiftable cylinder barrel in driven engagement with a dithering cylinder. This provides novel means for reducing breakaway friction and eliminating hydraulic locking effects.

It is still another object of the present invention to provide an apparatus of the type described that comprises an output shaft and eccentric assembly adapted to function asa coolant pump for delivering a flow of cooling fluid in heat exchange relationship with the previously mentioned cartridge motor mechanism.

Further objects and advantages of the present invention will beapparent from the following description, reference being had to the accompanying drawings wherein a preferred form of embodiment of the invention is clearly shown.

In the drawings:

FIG. 1 is a side sectional view of a fluid motor constructed in accordance with the present invention, the

section being taken along a vertical plane through the center line of the apparatus;

FIG. 2 is an end sectional view of the motor of FIG. 1,

the section being taken along the line 22 of FIG. 1;

FIG. 3 is a second end sectional view of the motor of FIG. 1, the section being taken along the line 3-3 of FIG. 1;

plate and pin assembly comprising a portion of the motor apparatus of FIG. 1;

FIG. 9 is a perspective view of a timing valve member comprising a portion of the motor apparatus of FIG. -1; and

FIG. 10 is a second end sectional view of the motor of FIG. 1, the section being taken along the line 10-10 of FIG. 1.

Referring in detail to the drawings, FIG. 1 illustrates a motor apparatus constructed in accordance with the present invention that includes a housing means indicated generally at comprising a front housing portion 22 and a rear housing portion 24. The housing portions 22 and 24 are removably joined together at a junction 26 by a plurality of axially extending threaded studs, not

illustrated.

Front housing portion 22 comprises a mounting flange 28 that includes mounting stud'h'oles 30.

An output shaft 30 is rotatably supported in the housing means by roller bearing assemblies 32 and 34 and an oil seal assembly 36 engages the periphery of shaft 30 at a resilient sealing element 38.

With reference to FIG. 1, a cam and pumping means indicated generally at 40 is keyed at 42 to the inner end of output shaft 30 and retained in place by a nut 44 and washer 46.

Cam means 40 is illustrated in detail in FIGS. 4 and 5 and includes a plurality of axially inclined pump passages 48, a timing valve driving slot 50, and an inclined piston driving surface 52.

Referring particularly to FIGS. 1 through 3, a cartridge type motor mechanism indicated generally at 54 comprises a cylindrical barrel 56 that is mounted for axial vibratory movement in the housing means by two barrel bearings 58, the outer surfaces of which conform with housing grooves 60 and barrel grooves 62.

As seen in FIGS. 1 and 3 barrel 56 further includes a plurality of axially extending cylinders 64 in which are slidably mounted a plurality of pistons 66.

As seen in FIG. 1, each of the pistons 66 comprises a ball shaped end portion 70 that fits into a socket portion 72, a piston foot member 74 formed of low friction material, such as nylon or the like, encased in a cupshaped housing 76. Such composite piston foot con- 4 struction is described in detail in my co-pending application Serial No. 167,030 filed January 18, 1962.

The piston foot housings 76 are pressure biased by a yoke member indicated generally at 78, illustrated in detail in FIGS. 6 and 7. The yoke member is preferably molded from nylon or the like and includes peripheral holes 80 through which the ends of pistons 66 are extended and sockets 82 forming seats for the piston foot housings 76.

As is best seen in FIGS. 6 and 7, the central portion of yoke member 78 forms a socket 84 for receiving a ballshaped end portion 86 of a timing valve member indicated generally at 90 and illustrated in isolated relationship in FIG. 9.

Valve member 90 is rotatably driven in a valve chamber 92 that extends axially through housing means 56 by means of a valve driver 94 secured in hole 96 by a press fit pin 9S. The valve driver 94 includes an outer arm 100 disposed freely in the previously described valve driver slot 50.

Referring in detail to FIGS. l3 and 9, valve member 90 comprises a rear annular pressure recess 102, an intermediate annular drain recess 104, a front arcuate pressure recess 106, and a front arcuate drain recess 108.

Pressure recess 102 releases fluid via intake port 110, a hole 112 in a transfer valve 114, hole 116 in barrel 56, a manifold pressure chamber 118, and hole 120 in barrel 56.

The pressurized fluid from pressure recess 102 is sequentially delivered to the cylinders 62 via spool passages 122, 124, 126, arcuate spool recess 106, and barrel passages as is best seen in FIGS. 1 and 2.

With continued reference to FIGS. 1 and 3, cylinders 64 are sequentially drained via barrel passages 129, arcuate drain recess 108, spool passages 130, 132 and 134, annular drain recess 104, a barrel passage 136, manifold drain portion 138, a barrel passage 140, a hole 142 through a transfer valve 144, and a drain port 146.

As will be seen in FIGS. 1. 9 and 10, timing valve member 90 is hydraulically balanced in its bore by means of two arcuatepressur'e balance recesses 220 and 222 located on the opposite side of the valve from main pressure recess 106, and by two arcuate drain balance recesses 224 and 226 located on the opposite side of valve from main drain recess 108.

FIG. 10 is a sectional view through one of the pressure recesses 222 and one of the drain recesses 224 from which it will be noted that radial passages such as the one seen at 228 in the sectional view of FIG. 10 connect the pressure balance recesses 220 and 222 with pressurized spool passage 124. Similarly, drain balance recesses 224 and 226 are connected with spool drain passage 132 via radial passages such as the one shown at 230 in FIG. 10.

It will be understood that the combined areas of pressure balance recesses 220 and 222 equal the area of main pressure recess 106 and the combined area of drain balance recess 108. This arrangement eliminates unbalanced side forces on timing valve member 90. I Referring next to FIGS. 1 and 9, spool member 90 is utilized as a link in the mechanism that pressure biases the pistons 66 against cam means 40 by slidably mounting two reaction pins and 151 in holes 152 drilled into the ends of the spool member.

The inner end 154 of one of the reaction pins 151 is exposed to pressurized fluid in spool passage 124 and thereby exerts force between spool member 90 and a reaction plate 156. As seen in FIGS. 1 and 8, reaction pins 150 and 151 also serve to mount a spool bearing portion 160, formed of nylon or the like, with the outer end of the pins 150 and 151 being extended into blind holes 162 in spool bearing portion 160.

A metal reinforcing cup 164 surrounds the periphery of spool bearing portion and includes holes 166 through which the pins are extended.

As is best seen in FIG. 8, a rear spool bearing portion 5 170 is mounted in a hole 172 in the center of reaction plate 156.

Reaction plate 156 is provided with a plurality of peripherally spaced holes 174 that receive the rear ends of a plurality of reaction plugs 180 and 180A, the reaction plate being located on the reaction plug ends by snap rings 184.

The front ends of the reaction plugs 180 and 180-A are disposed in cylinders 64 and serve to transmit axial reaction forces from cartridge 54 to the pump housing.

It should be pointed out that timing valve member 90, yoke 78, and piston feet '74 can, without departing from the spirit of the present invention, be mechanically biased towards cam means 40 by plugging holes 152 and replacing reaction pins 150 and 151 with a compression spring interposed between the rear end of spool member E0 and the confronting valve bearing member 160-164.

Referring to FIGS. 1 and 2, transfer valve members 114 are pressure biased against flat barrel surfaces 190 by compression springs 192 retained in place by threaded plugs 194.

As seen in FIG. 1, the front pump housing portion 22 forms an annular cylinder 202 that slideably mounts an annular piston 204, the latter including a shoulder 206 in force transmittingrelationship with the front end of cylinder barrel 56.

Annular cylinder 202 is connected to a pulsating fluid source, not illustrated, via a port 208. This serves to vibrate or dither cylinder barrel 56 to reduce breakaway friction and eliminate hydraulic locking effects.

The cylinder barrel mechanism 56 can be cooled, if desired, by providing pumping apertures 48 in cam means 40. This causes the cam means to function as a centrifugal pump between a front housing chamber 212 and the previously mentioned rear housing chamber 200. The coolant flow enters a coolant intake port 214 and is pumped through passages formed by flats 250, FIG. 2, on the outer surface of barrel 56 and then into chamber 200 and outwardly through a coolant outlet 216. See FIG. 1.

The previously mentioned front bearing 32 is supplied with a flow of lubricant via a passage 218.

In operation, intake port 110 is connected to a pump mechanism and outlet port 146 is connected to reservoir. The coolant intake port 214 and the coolant outlet port 216 are both connected to reservoir.

In starting the mechanism it is preferable to use the dither feature which is accomplished by connecting inlet port 208 leading to dither cylinder 202 to a source of vibrating fluid pressure. This can be accomplished by connecting the port to a small piston pump or other suitable means.

With the dither apparatus being used cylinder barrel 56 is vibrated by reciprocation of annular piston 204.

It should be pointed out that cylinder barrel 56 can be mechanically vibrated or dithered, if desired, by replacing cylinder 202 and annular piston 204 with an axially slideable push rod, not illustrated, which would be extended through a bearing hole in the rear housing wall 240. The push rod is in such instances connected to the end of cylinder barrel 56 and driven by a suitable pulsating prime mover, not illustrated, such as a motor driven eccentric.

Upon pressurization of intake port 110 fluid enters those of the cylinders 64 that are exposed to arcuate pressure recess 108, FIGS. 1 and 9, via the passage manifold, and recesses previously described. This starts the motor by moving the cylinders that are pushing on one side of the eccentric center of the cam causing rotation of the shaft and timing valve member 90. This advances arcuate pressure recess 108 sequentially to successive cylinders which are in turn driven downwardly. At the same time arcuate drain recess 106, FIGS. 1 and 9, sequentially communicates With the cylinder drain passages 130 and commences to drain each cylinder on the other side of the cam.

As the pump rotates cooling is effected since the passages 48 in cam and pump means 40 function as a centrifugal pump between front housing chamber 212 and rear housing chamber 200, a substantial seal between these chambers being effected by maintaining close tolerances between the periphery of cam means 40 and the inner surface of front housing portion 22. As the cam means effects pumping action coolant is drawn inwardly through coolant intake 214 and thence into front housing chamber 212. The coolant flow is next delivered through pump passages 48, rearwardly through housing chamber 200 and in heat exchange relationship with the motor cartridge and thence outwardly through coolant outlet port 216.

While the form of embodiment of the present invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

I claim:

1. In a fluid motor the combination of housing means; a cylinder barrel disposed in said housing means and including a plurality of cylinders, said cylinder barrel including a timing valve chamber and cylinder barrel intake and outlet ports; a plurality of pistons disposed in said cylinders; a plurality of reaction plugs having inner ends slideably disposed in said cylinders and outer ends freely engaging said housing means; shaft means rotatably supported by said housing means and including a cam in driven engagement with said pistons; timing valve means disposed in said valve chamber and driven by said shaft means; a plurality of axially extending removable barrel bearing members removably supporting said cylinder barrel in said housing means; and a hollow member mounted in said housing means and in engagement with said cylinder barrel for transferring fluid between said cylinder barrel and the exterior of said housing means.

2. The fluid motor defined in claim 1 wherein said cylinder barrel comprises a manifold passage that includes a high pressure manifold portion communicating with said barrel inlet port and a low pressure manifold portion communicating with said barrel outlet port; and wherein said timing valve means comprises a spool valve member rotatably disposed in said valve chamber and including a cylinder intake spool passage communicating with said high pressure manifold portion and sequentially connectable with said cylinders and a cylinder outlet spool passage communicating with said low pressure manifold portions and sequentially connectable with said cylinders.

3. In a fluid motor the combination of housing means; a cylinder barrel disposed in said housing means and including a plurality of cylinders, said cylinder barrel including a timing valve chamber and cylinder barrel intake and outlet ports; a plurality of pistons disposed in said cylinders; a plurality of reaction plugs having inner ends slidably disposed in said cylinders and outer ends freely engaging sad housing means; shaft means rotata bly supported by said housing means and including a cam in driven engagement with said pistons; timing valve means disposed in said valve chamber and driven by said means, said timing valve means comprises a spool valve member provided with a ball portion confronting said cam, a cylinder inlet spool passage, and a cylinder outlet spool passage; a yoke engaging end portions of said pistons and including a central socket portion in which said ball portion is mounted; and a spool reaction pin slidably mounted in said spool valve member and including an inner pin end exposed to pressurize-d fluid in said cylinder inlet spool passage and an outlet pin end in force transmitting relationship with said housing means.

4. In a fluid motor the combination of housing means; a cylinder barrel disposed in said housing means and including a plurality of cylinders, said cylinder barrel including a timing valve chamber and cylinder barrel intake and outlet ports; a plurality of pistons disposed in said cylinders; a plurality of reaction plugs having inner ends slidably disposed in said cylinders and outer ends freely engaging said housing means; shaft means rotatably supported by said housing means and including a cam in driven engagement with said pistons; timing valve means disposed in said valve chamber and driven by said means, said housing means comprises a plurality of longitudinally extending barrel mounting members supporting said cylinder barrel for axial movement relative to said housing means; a barrel driving cylinder formed by said housing means and including an inlet passage; a barrel driving piston in said barrel driving cylinder and in force transmitting relationship with said cylinder barrel; and means forming a source of pulsating fluid pressure communicating with said inlet passage of said barrel driving cylinder for vibrating said driving piston and barrel relative to said housing means.

5. In a fluid motor the combination of housing means; a cylinder barrel disposed in said housing means and including a plurality of cylinders, said cylinder barrel including a timing valve chamber and cylinder barrel intake and outlet ports; a plurality of pistons disposed in said cylinders; a plurality of reaction plugs having inner ends slidably disposed in said cylinders and outer ends freely engaging said housing means; shaft means rotatably supported by said housing means and including a cam in driven engagement with said pistons; timing valve means disposed in said valve chamber and driven by said means, said timing valve means comprises a spool valve member provided with a ball portion confronting said eccentric, a cylinder inlet spool passage, and a cylinder outlet spool passage; a yoke engaging end portions of said pistons and including a central socket portion in which said ball portion is mounted; and means forming a selfaligning driving connection between said ball portion of said spool valve member and said shaft means.

6. In a fluid motor the combination of housing means; a cylinder barrel disposed in said housing means and including a plurality of cylinders, said cylinder barrel including a timing valve chamber and cylinder barrel intake and outlet ports; a plurality of pistons disposed in said cylinders; a plurality of reaction plugs having inner ends slidably disposed in said cylinders and outer ends freely engaging said housing means; shaft means rotatably supported by said housing means and including a cam in driven engagement with said pistons; timing valve means disposed in said valve chamber and driven by said means, said housing means comprises a coolant chamber surrounding said cylinder barrel, a coolant inlet port, and a coolant outlet port; wherein said shaft means is provided with coolant pumping surfaces; and means forming a fluid seal between the periphery of said cam and said housing means which divides said coolant chamber into a low pressure chamber portion on one side of said cam that communicates with said coolant inlet port and a high pressure chamber portion on the other side of said cam that communicates with said coolant outlet port, said pumping surfaces serving to deliver a coolant flow between said chamber portions and in heat exchange relationship with said cylinder barrel.

7. In a fluid motor the combination of housing means; a cylinder barrel disposed in said housing means and including a plurality of cylinders, said cylinder barrel including a timing valve chamber and cylinder barrel intake and outlet ports at axially extending outer surfaces of said cylinder barrel; a plurality of pistons disposed in said cylinders; a hollow member mounted in said housing means and including an inner surface slidably engaging one of said axially extending outer surfaces of said cylinder barrel and a control passage communicating with one of said ports; shaft means rotatably supported by said housing means and including a cam in driven engagement with said pistons; and timing valve means disposed in said valve chamber and driven by said shaft means.

8. The fluid motor defined in claim 7 wherein said cylinder barrel comprises a manifold passage that includes a high pressure manifold portion communicating with said barrel inlet port and a low pressure manifold portion communicating with said barrel outlet port; and wherein said timing valve means comprises a spool valve member rotatably disposed in said valve chamber and including a cylinder intake spool passage communicating with said high pressure manifold portion and sequentially connectable with said cylinders and a cylinder outlet spool passage communicating with said low pressure manifold portion and sequentially connectible with said cylinders.

9. The fluid motor defined in claim 7 wherein said timing valve means comprises a spool valve member provided with a ball portion confronting said eccentric, a cylinder inlet spool passage, and a cylinder outlet spool passage; a yoke engaging end portions of said pistons and including a central socket portion in which said ball portion is mounted; and a spool reaction pin slideably mounted in said spool valve member and including an inner pin end exposed to pressurized fluid in said cylinder inlet spool passage and an outer pin end in force transmitting relationship with said housing means.

10. The fluid motor defined in claim 7 wherein said housing means comprises a plurality of longitudinally extending barrel mounting members supporting said cylinder barrel for axial movement relative to said housing means; a barrel driving cylinder formed by said housing means and including an inlet passage; a barrel driving piston in said barrel driving cylinder and in force transmitting relationship with said cylinder barrel; and means forming a source of pulsating fluid pressure communicating with said inlet passage of said barrel driving cylinder for vibrating said driving piston and barrel relative to said housing means.

11. The fluid motor defined in claim 7 wherein said timing valve means comprises a spool valve member provided with a bail portion confronting said cam, a cylinder inlet spool passage, and a cylinder outlet spool passage; a yoke engaging end portions of said pistons and including a central socket portion in which said ball portion is mounted; and means forming a flexible driving connection between said ball portion of said spool valve member and said shaft means.

12. The fluid motor defined in claim 7 wherein said housing means comprises a coolant chamber surrounding said cylinder barrel, a coolant inlet port, and a coolant outlet port; wherein said shaft means is provided with coolant pumping surfaces; and means forming a fluid seal between the periphery of said cam and said housing means which divides said coolant chamber into a low pressure chamber portion on one side of said cam that communicates with said coolant inlet port and a high pressure chamber portion on the other side of said cam that communicates with said coolant outlet port, said pumping surfaces serving to deliver a coolant flow between said chamber portions and in heat exchange relationship with said cylinder barrel.

13. The fluid motor defined in claim 7 wherein said hollow member is slideably mounted in a radially extending bore in said housing means and includes a radially outwardly facing annular surface exposed to pressurized fluid whereby said inner surface of said hollow member is pressure biased into sealed engagement with one of said axially extending outer surfaces of said cylinder barrel.

14. The fluid motor defined in claim 7 wherein said hollow member is slidably mounted in a radially extending bore in said housing means; and spring means interposed between said housing means and said hollow member for yieldably biasing said inner surface of said hollow member against one of said axially extending outer surfaces of said cylinder barrel.

15. In a fluid motor the combination of housing means; a cylinder barrel axially shiftably mounted in said housing means and including a plurality of cylinders; and vibratory power means for vibrating said barrel relative to said housing means; and rotary timing valve means mounted in said cylinder barrel for controlling the flow to said cylinders.

.16. The fluid motor defined in claim 15 wherein said vibratory power means comprises a cylinder formed by said housing means, an inlet port for said cylinder, and an annular piston mounted for vibratory movement in said cylinder and engaging said cylinder barrel.

17. In a fluid motor the combination of housing means; means forming a cylinder barrel including cylinders and pistons within said housing means and separated therefrom "by a coolant chamber provided with a coolant inlet port and a coolant outlet port; cam means rotatably mounted in said housing means between said two ports and in driven engagement with said mechanism, said cam means including a centrifugal pumping means; and rotary timing valve means mounted in said cylinder barrel for controlling the flow to said cylinders.

18. The fluid motor defined in claim 17 wherein said centrifugal pumping means is formed by a plurality of axially inclined holes in said cams means.

19. In a fluid motor the combination of housing means; a cylinder barrel including a plurality of circumferentially spaced axially disposed cylinders, a central bore, and a plurality of radially disposed passages connecting said cylinders with said bore; a timing valve member rotatably disposed in said bore and including a pressure recess sequentially connectable with said radial passages and a drain recess sequentially connectable with said radial passages; passage means connecting said recesses with the exterior of said housing means; a plurality of axially extending removable barrel bearing members removably supporting said cylinder barrel in said housing means; and a hollow member mounted in said housing means and in engagement with said cylinder barrel for transferring fluid between said cylinder barrel and the exterior of said housing means.

20. The fluid motor defined in claim 19 that includes a cam and shaft means rotatably mounted in said housing means; and means forming a self-aligning driving connection between said cam and shaft means and said timing valve member.

21. The fluid motor defined in claim 1 that includes yoke means engaging said pistons; and means for biasing said timing valve means towards said yoke means.

References Cited by the Examiner UNITED STATES PATENTS 2,385,990 10/ 1945 Huber 103-173 2,454,563 11/ 1948 Mercier 103173 2,518,618 8/1950 Huber 103-173 2,620,738 12/ 1952 Huber 103173 2,984,223 5/1961 Budzich 91-175 2,990,781 7/ 1961 Tuck et a1. 103173 3,036,558 5/1962 MacLeod 91175 3,056,387 10/1962 Budzich 91--175 3,082,693 3/1963 Budzich 103173 3,090,313 5/1963 Budzich 103-173 SAMUEL LEVINE, Primary Examiner.

FRED E. ENGELTHALER, Examiner. 

1. IN A FLUID MOTOR THE COMBINATION OF HOUSING MEANS; A CYLINDER BARREL DISPOSED IN SAID HOUSING MEANS AND INCLUDING A PLURALITY OF CYLINDERS, SAID CYLINDER BARREL INCLUDING A TIMING VALVE CHAMBER AND CYLINDER BARREL INTAKE AND OUTLET PORTS; A PLURALITY OF PISTONS DISPOSED IN SAID CYLINDERS; A PLURALITY OF REACTION PLUGS HAVING INNER ENDS SLIDEABLY DISPOSED IN SAID CYLINDERS AND OUTER ENDS FREELY ENGAGING SAID HOUSING MEANS; SHAFT MEANS ROTATABLY SUPPORTED BY SAID HOUSING MEANS AND INCLUDING A CAM IN DRIVEN ENGAGEMENT WITH SAID PISTONS; TIMING VALVE MEANS DISPOSED IN SAID VALVE CHAMBER AND DRIVEN BY SAID SHAFT MEANS; A PLURALITY OF AXIALLY EXTENDING REMOVABLE BARREL BEARING MEMBERS REMOVABLY SUPPORTING SAID CYLINDER BARREL IN SAID HOUSING MEANS; AND A HOLLOW MEMBER MOUNTED IN SAID HOUSING MEANS AND IN ENGAGEMENT WITH SAID CYLINDER BARREL FOR TRANSFERRING FLUID BETWEEN SAID CYLINDER BARREL AND THE EXTERIOR OF SAID HOUSING MEANS. 